George Conway, the husband of White House counselor Kellyanne Conway, says Donald Trump may have obstructed justice and tampered with witnesses in special counsel Robert Mueller’s Russia investigation.

George Conway cited two laws in response to a Trump tweet attacking the Mueller probe on Monday. In that tweet, Trump slammed his former longtime lawyer Michael Cohen, saying he should be in prison, and praised his confidant Roger Stone for vowing to not testify against him.

“File under ’18 U.S.C. §§ 1503, 1512,’” Conway wrote in response to the Stone tweet, referring to obstruction of justice and witness tampering laws.

File under “18 U.S.C. §§ 1503, 1512” https://t.co/e4ZGVn1kJi

— George Conway (@gtconway3d) December 3, 2018

Conway has been a frequent critic of Trump, even though his wife works closely with the president.

Neal Katyal, the former acting solicitor general under President Obama who has co-written with Conway opinion pieces critical of Trump, agreed with Conway.

“This is genuinely looking like witness tampering. DOJ (at least with a nonfake AG) prosecutes cases like these all the time. The fact it’s done out in the open is no defense. Trump is genuinely melting down, and no good lawyer can represent him under these circs,” Katyal said.

George is right. This is genuinely looking like witness tampering. DOJ (at least with a nonfake AG) prosecutes cases like these all the time. The fact it's done out in the open is no defense. Trump is genuinely melting down, and no good lawyer can represent him under these circs https://t.co/zqFUoQvWTf

— Neal Katyal (@neal_katyal) December 3, 2018

Twitter was quick to respond:

I'm guessing that George is giving @KellyannePolls enough rope….so that he gets custody of the kids.

— NotInvisibleUSA???? (@indivisible_usa) December 3, 2018

The husband of a top Trump White House adviser just essentially accused Trump of breaking the law with witness tampering. File under "This is a Big Deal." https://t.co/6n3AzQ1zrh

— David Corn (@DavidCornDC) December 3, 2018

This seems really disrespectful to your wife. I can’t imagine having a husband publicly trashing your boss constantly.

— Cassandra Fairbanks ❤️⏳ (@CassandraRules) December 3, 2018

Wife:

But George, if you keep tweeting there’s a chance I’ll have some legal exposure based on my liarreah over the past two years.

Husband: Kellyanne, great is the truth and it prevails.

— Doug (@SaidDoug) December 3, 2018

1. This is Kelllyanne Conway’s husband.
2. 18 U.S. Code § 1503 = "endeavors to influence, intimidate, or impede any grand or petit juror, or officer in or of any court of the United States" https://t.co/N80CC95TIY

— Leah McElrath (@leahmcelrath) December 3, 2018

Hi @KellyannePolls, your husband just called out your boss for committing a federal crime. Your marriage must be insane. https://t.co/N6RR4iDD1O

— Ricky Davila (@TheRickyDavila) December 3, 2018

The reason this investigation is taking so long is that everyone being investigated lies all the time about everything; they continue to commit new crimes that need to be investigated. It's an accelerating downward spiral… https://t.co/fasVkyl2Ou

— Ray Thompson (@rathompson01) December 3, 2018